I always the drop down next to 'Print/Export' then 'Save PNG' causing a new tab to open with the image after clicking 'OK' to the resolution. Then to your point, it would be nice to right click and select copy image, so you can paste it into another document, but nope. I just save the image to my computer then drag the image into the document. Its more steps but in some cases I like to have the image save as a standalone file.